Well, technically speaking, no. For instance, putting a game in Google Play it will take you easily one day. You have to make graphics, descriptions, fill-in forms, compile like this or like that. Then just wait and it appears on the store. Same for Apple Store. There are also collateral things, like you need to have some website where you have to put the privacy policy and terms of service so you can have a link from the stores to those pages. But once the things are published, is when the marketing enters in action. And that itself is a whole new beast.